Thomas Lyp
Initial commit
Diff: mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/device/stm32f4xx_ll_i2c.c
- Revision:
- 0:bb348c97df44
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/device/stm32f4xx_ll_i2c.c Wed Sep 16 01:11:49 2020 +0000
@@ -0,0 +1,269 @@
+/**
+ ******************************************************************************
+ * @file stm32f4xx_ll_i2c.c
+ * @author MCD Application Team
+ * @brief I2C LL module driver.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+#if defined(USE_FULL_LL_DRIVER)
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_ll_i2c.h"
+#include "stm32f4xx_ll_bus.h"
+#include "stm32f4xx_ll_rcc.h"
+#ifdef USE_FULL_ASSERT
+#include "stm32_assert.h"
+#else
+#define assert_param(expr) ((void)0U)
+#endif
+
+/** @addtogroup STM32F4xx_LL_Driver
+ * @{
+ */
+
+#if defined (I2C1) || defined (I2C2) || defined (I2C3)
+
+/** @defgroup I2C_LL I2C
+ * @{
+ */
+
+/* Private types -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private constants ---------------------------------------------------------*/
+/* Private macros ------------------------------------------------------------*/
+/** @addtogroup I2C_LL_Private_Macros
+ * @{
+ */
+
+#define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__) (((__VALUE__) == LL_I2C_MODE_I2C) || \
+ ((__VALUE__) == LL_I2C_MODE_SMBUS_HOST) || \
+ ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \
+ ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP))
+
+#define IS_LL_I2C_CLOCK_SPEED(__VALUE__) (((__VALUE__) > 0U) && ((__VALUE__) <= LL_I2C_MAX_SPEED_FAST))
+
+#define IS_LL_I2C_DUTY_CYCLE(__VALUE__) (((__VALUE__) == LL_I2C_DUTYCYCLE_2) || \
+ ((__VALUE__) == LL_I2C_DUTYCYCLE_16_9))
+
+#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
+#define IS_LL_I2C_ANALOG_FILTER(__VALUE__) (((__VALUE__) == LL_I2C_ANALOGFILTER_ENABLE) || \
+ ((__VALUE__) == LL_I2C_ANALOGFILTER_DISABLE))
+
+#define IS_LL_I2C_DIGITAL_FILTER(__VALUE__) ((__VALUE__) <= 0x0000000FU)
+
+#endif
+#define IS_LL_I2C_OWN_ADDRESS1(__VALUE__) ((__VALUE__) <= 0x000003FFU)
+
+#define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__) (((__VALUE__) == LL_I2C_ACK) || \
+ ((__VALUE__) == LL_I2C_NACK))
+
+#define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__) (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \
+ ((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT))
+/**
+ * @}
+ */
+
+/* Private function prototypes -----------------------------------------------*/
+
+/* Exported functions --------------------------------------------------------*/
+/** @addtogroup I2C_LL_Exported_Functions
+ * @{
+ */
+
+/** @addtogroup I2C_LL_EF_Init
+ * @{
+ */
+
+/**
+ * @brief De-initialize the I2C registers to their default reset values.
+ * @param I2Cx I2C Instance.
+ * @retval An ErrorStatus enumeration value:
+ * - SUCCESS: I2C registers are de-initialized
+ * - ERROR: I2C registers are not de-initialized
+ */
+uint32_t LL_I2C_DeInit(I2C_TypeDef *I2Cx)
+{
+ ErrorStatus status = SUCCESS;
+
+ /* Check the I2C Instance I2Cx */
+ assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
+
+ if (I2Cx == I2C1)
+ {
+ /* Force reset of I2C clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);
+
+ /* Release reset of I2C clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);
+ }
+ else if (I2Cx == I2C2)
+ {
+ /* Force reset of I2C clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C2);
+
+ /* Release reset of I2C clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C2);
+
+ }
+#if defined(I2C3)
+ else if (I2Cx == I2C3)
+ {
+ /* Force reset of I2C clock */
+ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C3);
+
+ /* Release reset of I2C clock */
+ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C3);
+ }
+#endif
+ else
+ {
+ status = ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Initialize the I2C registers according to the specified parameters in I2C_InitStruct.
+ * @param I2Cx I2C Instance.
+ * @param I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure.
+ * @retval An ErrorStatus enumeration value:
+ * - SUCCESS: I2C registers are initialized
+ * - ERROR: Not applicable
+ */
+uint32_t LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct)
+{
+ LL_RCC_ClocksTypeDef rcc_clocks;
+
+ /* Check the I2C Instance I2Cx */
+ assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
+
+ /* Check the I2C parameters from I2C_InitStruct */
+ assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode));
+ assert_param(IS_LL_I2C_CLOCK_SPEED(I2C_InitStruct->ClockSpeed));
+ assert_param(IS_LL_I2C_DUTY_CYCLE(I2C_InitStruct->DutyCycle));
+#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
+ assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter));
+ assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter));
+#endif
+ assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1));
+ assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge));
+ assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize));
+
+ /* Disable the selected I2Cx Peripheral */
+ LL_I2C_Disable(I2Cx);
+
+ /* Retrieve Clock frequencies */
+ LL_RCC_GetSystemClocksFreq(&rcc_clocks);
+
+#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
+ /*---------------------------- I2Cx FLTR Configuration -----------------------
+ * Configure the analog and digital noise filters with parameters :
+ * - AnalogFilter: I2C_FLTR_ANFOFF bit
+ * - DigitalFilter: I2C_FLTR_DNF[3:0] bits
+ */
+ LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter);
+
+#endif
+ /*---------------------------- I2Cx SCL Clock Speed Configuration ------------
+ * Configure the SCL speed :
+ * - ClockSpeed: I2C_CR2_FREQ[5:0], I2C_TRISE_TRISE[5:0], I2C_CCR_FS,
+ * and I2C_CCR_CCR[11:0] bits
+ * - DutyCycle: I2C_CCR_DUTY[7:0] bits
+ */
+ LL_I2C_ConfigSpeed(I2Cx, rcc_clocks.PCLK1_Frequency, I2C_InitStruct->ClockSpeed, I2C_InitStruct->DutyCycle);
+
+ /*---------------------------- I2Cx OAR1 Configuration -----------------------
+ * Disable, Configure and Enable I2Cx device own address 1 with parameters :
+ * - OwnAddress1: I2C_OAR1_ADD[9:8], I2C_OAR1_ADD[7:1] and I2C_OAR1_ADD0 bits
+ * - OwnAddrSize: I2C_OAR1_ADDMODE bit
+ */
+ LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize);
+
+ /*---------------------------- I2Cx MODE Configuration -----------------------
+ * Configure I2Cx peripheral mode with parameter :
+ * - PeripheralMode: I2C_CR1_SMBUS, I2C_CR1_SMBTYPE and I2C_CR1_ENARP bits
+ */
+ LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode);
+
+ /* Enable the selected I2Cx Peripheral */
+ LL_I2C_Enable(I2Cx);
+
+ /*---------------------------- I2Cx CR2 Configuration ------------------------
+ * Configure the ACKnowledge or Non ACKnowledge condition
+ * after the address receive match code or next received byte with parameter :
+ * - TypeAcknowledge: I2C_CR2_NACK bit
+ */
+ LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge);
+
+ return SUCCESS;
+}
+
+/**
+ * @brief Set each @ref LL_I2C_InitTypeDef field to default value.
+ * @param I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure.
+ * @retval None
+ */
+void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct)
+{
+ /* Set I2C_InitStruct fields to default values */
+ I2C_InitStruct->PeripheralMode = LL_I2C_MODE_I2C;
+ I2C_InitStruct->ClockSpeed = 5000U;
+ I2C_InitStruct->DutyCycle = LL_I2C_DUTYCYCLE_2;
+#if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
+ I2C_InitStruct->AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
+ I2C_InitStruct->DigitalFilter = 0U;
+#endif
+ I2C_InitStruct->OwnAddress1 = 0U;
+ I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK;
+ I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* I2C1 || I2C2 || I2C3 */
+
+/**
+ * @}
+ */
+
+#endif /* USE_FULL_LL_DRIVER */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/